Dan Kilpatrick discusses what Harry Winks could bring to the England side after he was called up to replace Fabian Delph and Phil Jones.

Tottenham's Harry Winks has been called up by England for the first time after injury forced Phil Jones and Fabian Delph out of Gareth Southgate's squad.

Southgate named a 26-man squad for the World Cup qualifiers against Slovenia and Lithuania, but injuries forced the England boss to tweak things on Monday.

Delph -- called up by Southgate for the first time -- played the entirety of Manchester City's Premier League win at Chelsea on Saturday, but has withdrawn from the squad after a reported muscle strain was assessed at St George's Park.

Manchester United defender Jones was involved for the full 90 minutes against Crystal Palace over the weekend, but he too missed training on Monday and has since left the camp.

Tottenham midfielder Winks has come in as a result of the injuries -- the 21-year-old's first senior call-up. Initially called up to Aidy Boothroyd's under-21s squad, he has recovered from ankle ligament damage this term and made seven appearances for Spurs.

England are five points clear at the top of Group F, with Thursday's home game against Slovenia and next weekend's trip to Lithuania to come.

Before training began on Monday, an emotional Charlton told England's players to embrace the state-of-the-art facilities at St George's Park after the training pitch was re-named in the World Cup winner's honour.

After winning 106 caps, scoring 49 goals and playing a key role in the triumph of 1966, the former midfielder's achievements were recognised once again ahead of his 80th birthday next Wednesday.

England's training area at St George's Park -- celebrating its fifth anniversary -- has been renamed the Sir Bobby Charlton Pitch in the Manchester United great's honour.

Charlton and his wife Norma were welcomed by manager Gareth Southgate before training on Monday, where Harry Kane went over to speak to him before the informal unveiling ceremony.

"Lads, before we start training, I mentioned to you earlier Sir Bobby is here today," the England boss told his squad. "For us, it is a great privilege, one of our greatest ever players and as we know such an important player in us winning the World Cup.

"One of our greatest ambassadors as well for the game. We're delighted to have you, it is fantastic for us to name a pitch after you.

"It is Sir Bobby's 80th birthday next week and also the fifth anniversary of St George's Park, which he was a big advocate of."

Charlton became tearful before Southgate spoke and used the opportunity to tell England's current crop to embrace their surroundings.

"It's a pleasure," he said. "I loved every minute when I was a footballer -- every minute of the day.

"I used to practice and at Manchester United there was a big wall on the side of the pitch and I used to practice with my left foot, with my right foot, with my chest.

"Fortunately, I became really quite successful but I am thrilled that this sort of facility is here. We never had anything like this when we were footballers and I hope you appreciate it."

Charlton was presented by Southgate with a signed England shirt with 'Charlton 80' on the back, before all squad members shook hands with the World Cup winner.

The 79-year-old will also be guest of honour at Thursday's World Cup qualifier against Slovenia at Wembley, where England could secure qualification for next summer's tournament.